<template>
  <div ref="viewerRef" id="markdownViewer" :class="$props.class"></div>
</template>

<script lang="ts" setup>
import { onBeforeUnmount, onDeactivated, Ref, ref, unref, watch } from "vue";
import VditorPreview from "vditor/dist/method.min";
import { onMountedOrActivated } from "@vben/hooks";
import { useRootSetting } from "@/hooks/setting/useRootSetting";
import { getTheme } from "./getTheme";

const props = defineProps({
  value: { type: String },
  class: { type: String },
});
const viewerRef = ref(null);
const vditorPreviewRef = ref(null) as Ref<VditorPreview | null>;
const { getDarkMode } = useRootSetting();

function init() {
  const viewerEl = unref(viewerRef);
  vditorPreviewRef.value = VditorPreview.preview(viewerEl, props.value, {
    mode: getTheme(getDarkMode.value, "content"),
    theme: {
      // 设置内容主题
      current: getTheme(getDarkMode.value, "content"),
    },
    hljs: {
      // 设置代码块主题
      style: getTheme(getDarkMode.value, "code"),
    },
  });
}
watch(
  () => getDarkMode.value,
  (val) => {
    VditorPreview.setContentTheme(getTheme(val, "content"));
    VditorPreview.setCodeTheme(getTheme(val, "code"));
    init();
  },
);

watch(
  () => props.value,
  (v, oldValue) => {
    v !== oldValue && init();
  },
);

function destroy() {
  const vditorInstance = unref(vditorPreviewRef);
  if (!vditorInstance) return;
  try {
    vditorInstance?.destroy?.();
  } catch (error) {
    //
  }
  vditorPreviewRef.value = null;
}

onMountedOrActivated(init);

onBeforeUnmount(destroy);
onDeactivated(destroy);
</script>
